[Commons-l] API call for "File Usage on other wikis"?

[Paul Houle]

Hi,  I'm looking for the API call can be used to get the "File Usage On 
Other Wikis" that is commonly seen on pages in commons.wikimedia.org,  
for example,  near the bottom of:

http://commons.wikimedia.org/wiki/File:Almogaren_roquebentayga.jpg

I'm curious also about the origin of the "metadata" that's at the bottom 
of the page...  does that come directly from the EXIF data in the *.jpg 
or is it stored in a database table and accessable via the API?